Expect exact matches on -g/--geometry-level

[andrewphilipsmith]

When specifying a geometry level (-g/--geometry-level), I would expect the default behaviour to only include expected matches. Failing that, I would like an option to require exact matches only.

How to reproduce

popgetter metrics -c gb_eaw -g "oa" -t "Number of cars or vans"

Expected Result

Only return results where geometry=="oa"

Actual Result

Returns results where str(geometry).contains("oa"). (eg msoa, lsoa, oa)

[sgreenbury]

Closing as superseded by #81.